Abstract
Plenaris (oxathiapiprolin) applied to sunflower seedlings was highly effective in controlling downy mildew incited by the oomycete Plasmopara halstedii. In vitro assays revealed strong suppression of zoospore release and cystospore germination of P.halstedii by Plenaris. Bion (acibenzolar-S-methyl) and Apron (mefenoxam) were partially effective when used singly, but performed synergistically when mixed with Plenaris. Seed treatment (coating) with Plenaris provided dose-dependent control of the disease whereas Bion and Apron provided partial or poor control. However, seeds treated with mixtures containing reduced rates of Plenaris and full rates of Bion and/or Apron provided complete control of the disease due to the synergistic interaction between these components. Such mixtures should be used for seed treatment in the field to minimize selection pressure imposed on the pathogen.
| Original language | English |
|---|---|
| Article number | e0222827 |
| Journal | PLoS ONE |
| Volume | 14 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1 Sep 2019 |
Bibliographical note
Publisher Copyright:© 2019 Cohen et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Funding
The authors received no specific funding for this work. We thank the following researchers for providing isolates of Plasmopara halstedii: Tatiana Antonova of the All Russia Research Institute of Oil Crops (VNIIMK), Krasnodar, Russia, Leire Molinero Ruiz of the Instituto de Agricultura Sostenible (IAS), CSIC, Cordoba, Spain, and Omur Baysal of Muğla Sıtkı Koçman Üniversity, Kötekli/Muğla, Turkey.
| Funders | Funder number |
|---|---|
| Instituto de Agricultura Sostenible | |
| Tatiana Antonova of the All Russia Research Institute of Oil Crops | |
| VNIIMK | |
| Consejo Superior de Investigaciones Científicas |